<template>
    <div class="app-container">
        <el-form label-width="120px">
        <el-form-item label="信息描述">
        <el-tag type="info">excel模版说明</el-tag>
        <el-tag>
        <i class="el-icon-download"/>
        <a :href="'/static/01.xlsx'">点击下载模版</a>
        </el-tag>
        </el-form-item>
        <el-form-item label="选择Excel">
        <el-upload
        ref="upload"
        :auto-upload="false"
        :on-success="fileUploadSuccess"
        :on-error="fileUploadError"
        :disabled="importBtnDisabled"
        :limit="1"
        :action="BASE_API+'/cmsservice/subject/addSubject'"
        name="file"
        accept="application/.xlsx">
        <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
        <el-button
        :loading="loading"
        style="margin-left: 10px;"
        size="small"
        type="success"
        @click="submitUpload">{{ fileUploadBtnText }}</el-button>
        </el-upload>
        </el-form-item>
        </el-form>
    </div>
</template>
<script>
export default {
    data() {
        return {
        BASE_API: process.env.BASE_API, // 接口API地址
        // OSS_PATH: process.env.OSS_PATH, // 阿里云OSS地址
        fileUploadBtnText: '上传到服务器', // 按钮文字
        importBtnDisabled: false, // 按钮是否禁用,
        loading: false,
        timer: ''
        }
    },
    beforeDestroy() {
      clearTimeout(this.timer);
    },
    methods: {
        submitUpload() {
        //上传文件
        this.fileUploadBtnText = '正在上传'
        this.importBtnDisabled = true
        this.loading = true
        this.$refs.upload.submit()
        this.timer=setTimeout(this.updateloading, 8000);
        },
        updateloading() {
            this.importBtnDisabled = false
            this.loading = false
            this.fileUploadBtnText = '上传到服务器'
        },
        //上传成功回调
        fileUploadSuccess(response) {
            //提示信息
            this.loading = false
            this.$message({
            type: 'success',
            message: '添加课程分类成功'
            })
            this.$router.push({path:'/subject/list' })
        },
        //上传失败
        fileUploadError(response) {
            this.loading = false
            this.$message({
                type: 'error',
                message: '添加课程分类失败'
            })
        }
    }
}
</script>